Driving support apparatus for vehicle

1. A driving support apparatus for a vehicle comprising:

a driving environment recognition unit for recognizing a driving environment in front of the vehicle to detect three-dimensional object information;

a control subject extracting unit for extracting a control subject from three-dimensional objects present in front of the vehicle based upon a condition set beforehand;

a braking control unit for executing plural braking controls, each having a different braking level, in a stepwise manner according to need based upon a relative relationship between the vehicle and the control subject; and

an inhibiting unit for inhibiting execution of the braking controls sequentially in the order of the braking level from the highest one, when the height of the three-dimensional object extracted as the control subject is less than a set height, wherein:

when the height of the three-dimensional object extracted as the control subject is less than the set height, the inhibiting unit inhibits the execution of the braking controls such that, the lower the height of the three-dimensional object is, the more braking controls to be executed in a stepwise manner in a stepwise manner are inhibited, and

when the height of the three-dimensional object extracted as the control subject is equal to or higher than the set height, the braking control unit executes one or more of the braking controls, when a time-to-collision is equal to or less than a threshold time.

2. The driving support apparatus for a vehicle according to claim 1 , wherein the set height is set to be lower than a minimum road clearance of the vehicle.

3. The driving support apparatus for a vehicle according to claim 1 , wherein the inhibiting unit inhibits such that, the more the speed of the vehicle increases, the more braking controls are inhibited.

4. The driving support apparatus for a vehicle according to claim 2 , wherein the inhibiting unit inhibits such that, the more the speed of the vehicle increases, the more braking controls are inhibited.

5. A driving support apparatus for a vehicle comprising:

a detector configured to detect a height of a three-dimensional object in front of the vehicle;

a braking controller configured to execute one or more of braking controls in a stepwise manner based upon a relative relationship between the vehicle and the three-dimensional object, each of the braking controls having a different braking level; and

a driving controller configured to inhibit execution of one or more of the braking controls sequentially in the order of the braking level from the strongest one, when the height of the three-dimensional object is less than a threshold height, wherein:

when the height of the three-dimensional object is less than the threshold height, the driving controller inhibits the execution of the braking controls such that the lower the height of the three-dimensional object is, the more number of the braking controls to be executed in a stepwise manner is inhibited, and

when the height of the three-dimensional object is equal to or higher than the threshold height, the braking controller executes one or more of the braking controls, when a time-to-collision is equal to or less than a threshold time.

6. The driving support apparatus for a vehicle according to claim 5 , wherein the threshold height is set to be lower than a minimum road clearance of the vehicle.

7. The driving support apparatus for a vehicle according to claim 5 , wherein the driving controller inhibits the execution of the braking controls such that the higher a speed of the vehicle is, the more number of the braking controls is inhibited.

8. The driving support apparatus for a vehicle according to claim 5 , wherein the braking controls includes, from the strongest one, an emergency brake control, an alarm brake control and an alarm control.

9. The driving support apparatus for a vehicle according to claim 1 , wherein the braking controls includes, from the strongest one, an emergency brake control, an alarm brake control and an alarm control.

10. A driving support apparatus for a vehicle comprising:

a driving environment recognition unit for recognizing a driving environment in front of the vehicle to detect three-dimensional object information;

a control subject extracting unit for extracting a control subject from three-dimensional objects present in front of the vehicle based upon a condition set beforehand;

a braking control unit for executing plural braking controls, each having a different braking level, in a stepwise manner according to need based upon a relative relationship between the vehicle and the control subject; and

an inhibiting unit for inhibiting execution of the braking controls sequentially in the order of the braking level from the highest one, when the height of the three-dimensional object extracted as the control subject is less than a set height, wherein:

the inhibiting unit inhibits the execution of the braking controls such that, the lower the height of the three-dimensional object is, the more braking controls are inhibited, and

the inhibiting unit inhibits such that, the more the speed of the vehicle increases, the more braking controls are inhibited.

11. The driving support apparatus for a vehicle according to claim 10 , wherein the set height is set to be lower than a minimum road clearance of the vehicle.

12. The driving support apparatus for a vehicle according to claim 10 , wherein the braking control unit executes one or more of the braking controls which are not inhibited by the inhibiting unit when a time-to-collision is equal to or less than a threshold time.

13. The driving support apparatus for a vehicle according to claim 10 , wherein the braking controls includes, from the strongest one, an emergency brake control, an alarm brake control and an alarm control.